By Teismann Holger   in American Mathematical Monthly

ISSN:1930-0972|120|2|99-115

Mathematical Association of America‎(2013)‎

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By Illner Reinhard   Lange Horst   Teismann Holger   in ESAIM: Control, Optimisation and Calculus of Variations

ISSN:1292-8119|12|4|615-635

Edp Sciences‎(2006)‎

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